Chair



FIG. 1 is a front elevational view of a chair showing my new ornamental design;

FIG. 2 is a rear elevational view of the chair of FIG. 1;

FIG. 3 is a right-side elevational view of the chair of FIG. 1, the left side being substantially a mirror image thereof; and,

FIG. 4 is a top plan view of the chair of FIG. 1. 

The ornamental design for a chair, as shown and described. 